It's a good start though as it only means that you are putting an importance of the forum members as your future players or users in your platform but I will be hoping that you will increase the number of participants in the future if in case your signature campaign is giving you a good result.

And also, accepting starting from Full member and up will be better also if everything will work fine. And I notice that you will be asking for a KYC if a user will win more than 0.1btc or almost $4k, so it only means that the big players will surely need to pass first your KYC before they can continue to use your platform.